結果

問題 No.2411 Reverse Directions
コンテスト
ユーザー flygon
提出日時 2023-08-11 22:46:18
言語 PyPy3
(7.3.15)
結果
WA  
実行時間 -
コード長 2,981 bytes
コンパイル時間 234 ms
コンパイル使用メモリ 82,028 KB
実行使用メモリ 85,220 KB
最終ジャッジ日時 2024-11-18 17:48:51
合計ジャッジ時間 6,611 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 1 WA * 2
other AC * 7 WA * 22
権限があれば一括ダウンロードができます

ソースコード

diff #
raw source code 

import sys
# sys.setrecursionlimit(5*10**5)
input = sys.stdin.readline
from collections import defaultdict, deque, Counter
from heapq import heappop, heappush
from bisect import bisect_left, bisect_right
from math import gcd

h,w,k,l,r = map(int,input().split())

if (r-l + 1) % 2 != 0:
    print("No")
    exit()
s = [input().rstrip() for i in range(h)]
dx = [0,0,1,-1]
dy = [1,-1,0,0]
def bfs(x,y):
    que = deque([x*w+y])
    depth = [-1]*(w*h)
    depth[x*w+y] = 0
    pre = [-1]*(h*w)
    while que:
        crr= que.popleft()
        x,y = crr//w, crr%w
        for i in range(4):
            nx = x+dx[i]
            ny = y+dy[i]
            nxt = nx*w+ny
            if not(0<=nx<h and 0<=ny<w): continue
            if s[nx][ny] == "#": continue
            if depth[nxt] == -1:
                depth[nxt] = depth[crr] + 1
                pre[nxt] = x*w+y
                que.append(nxt)
    return depth,pre

cnt = l-1 + k-r
d1,p1 = bfs(0,0)
d2,p2 = bfs(h-1,w-1)


# mid = []
# mpos = ()
# for i in range(h):
#     for j in range(w):
#         pos = i*w+j
#         ok = 1
#         ok &= d1[pos] % 2 == (l-1)%2 
#         ok &= d2[pos] % 2 == (k-r)%2
#         ok &= d1[pos] <= (l-1) 
#         ok &= d2[pos] <= (k-r)
#         if not ok: continue
#         if i != 0 and i != h-1 and s[i+1][j] == "." and s[i-1][j] == ".":
#             mid = ["UD"]*((r-l+1)//2)
#             mpos = i*w+j
#         if j != 0 and j != w-1 and s[i][j-1] == "." and s[i][j+1] == ".":
#             mid = ["LR"]*((r-l+1)//2)
#             mpos = i*w+j
#         if mid:break
#     if mid:break
# if not mid:
#     print("No")
#     exit()

# pre = []
# now = mpos
# while now != 0:
#     now = p1[now]
#     pre.append(now)
# pre = pre[::-1]
# pre.append(mpos)

# suf = [mpos]
# now = mpos
# while now != (h-1)*w+w-1:
#     now = p2[now]
#     suf.append(now)

# anspre = []
# anssuf = []

# for i in range(1,len(pre)):
#     cx,cy = pre[i]//w, pre[i]%w
#     px,py = pre[i-1]//w, pre[i-1]%w
#     if cx == px + 1:
#         anspre.append("D")
#     if cx == px - 1:
#         anspre.append("U")
#     if cy == py + 1:
#         anspre.append("R")
#     if cy == py - 1:
#         anspre.append("L")

        
# for i in range(1,len(suf)):
#     cx,cy = suf[i]//w, suf[i]%w
#     px,py = suf[i-1]//w, suf[i-1]%w
#     if cx == px + 1:
#         anssuf.append("D")
#     if cx == px - 1:
#         anssuf.append("U")
#     if cy == py + 1:
#         anssuf.append("R")
#     if cy == py - 1:
#         anssuf.append("L")

# if len(anspre) <= l - 1:
#     dif = l-1-len(anspre)
#     if anspre[0] == "R":
#         tmp = ["RL"]*(dif // 2)
#     if anspre[0] == "D":
#         tmp = ["DU"]*(dif // 2)
#     anspre = tmp + anspre

# if len(anssuf) <= k-r:
#     dif = k-r-len(anssuf)
#     if anssuf[-1] == "D":
#         tmp = ["UD"]*(dif // 2)
#     else:
#         tmp = ["LR"]*(dif // 2)
#     anssuf = anssuf + tmp

# ans = anspre + mid + anssuf
# print('Yes')
# print("".join(ans))
0